Official data from INPI

PROCESSO PARA A PRODUÇÃO DE FERRO GUSA

Em AnáliseInvention Patent

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Application data

Number

PI8505114

Type

Invention Patent

Filing

10/15/1985

Publication

07/29/1986

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Progress at the INPI

Filing10/15/85
Publication07/29/86
Examination02/10/87
Allowance12/24/91
Grant03/30/93
Expired07/15/08

The letters patent expired on 07/15/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 02/10/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Deutsche Voest Alpine Industrieanlagenbau Gmbh

Korf Engineering GMBH

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Inventors

D. H. (pessoa física)

Technical data

IPC Classification

C21B 13/02

Priority claims

P 34 38 487.1 · 10/17/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

02/10/1987

RPI 851

Publicação do pedido de patente

#3.1

07/29/1986

RPI 823

Pedido de patente depositado

#2.1

12/17/1985

RPI 791

Carta-patente expirada

#21.1

Patente extinta em 15/10/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

03/30/1993

RPI 1165

14.4

11/24/1992

RPI 1147

14.6

06/30/1992

RPI 1126

Deferimento

#9.1

12/24/1991

RPI 1099

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